package com.junxian.demo02.controller;

import com.junxian.demo02.domain.User;
import org.springframework.web.bind.annotation.*;

import java.util.*;

/**
 * Created by admin on 2018/12/4.
 */

@RestController
@RequestMapping(value = "/users")//设置映射都在/users下
public class UserController {
    // 创建线程安全的Map
    static Map<Long , User> users = Collections.synchronizedMap(new HashMap<Long , User>());

    // 处理"/users/"的GET请求，用来获取用户列表
    // 还可以通过@RequestParam从页面中传递参数来进行查询条件或者翻页信息的传递
    @RequestMapping(value = "/" ,method = RequestMethod.GET)
    public List<User> getUserList(){
        List<User> list = new ArrayList<User>(users.values());
        return list;
    }

    // 处理"/users/"的POST请求，用来创建User
    // 除了@ModelAttribute绑定参数之外，还可以通过@RequestParam从页面中传递参数
    @RequestMapping(value = "/" , method = RequestMethod.POST)
    public String postUser(@ModelAttribute User user){
        users.put(user.getId() , user);
        return "success";
    }

    // 处理"/users/{id}"的GET请求，用来获取url中id值的User信息
    // url中的id可通过@PathVariable绑定到函数的参数中
    @RequestMapping(value = "/{id}" , method = RequestMethod.GET)
    public User getUser(@PathVariable Long id){
        return users.get(id);
    }

    // 处理"/users/{id}"的PUT请求，用来更新User信息
    @RequestMapping(value = "/{id}" , method = RequestMethod.PUT)
    public String putUser(@PathVariable Long id , @ModelAttribute User user){
        User user1 = users.get(id);
        user1.setName(user.getName());
        user1.setAge(user.getAge());
        users.put(id , user1);
        return "success";
    }

    // 处理"/users/{id}"的DELETE请求，用来删除User
    @RequestMapping(value = "/{id}" , method = RequestMethod.DELETE)
    public String deleteUser(@PathVariable Long id){
        users.remove(id);
        return "success";
    }
}
